Github user aarondav commented on the pull request: https://github.com/apache/spark/pull/2524#issuecomment-64813367 @mateiz @CodingCat Apologies, but can I confirm that the scope of this change is strictly to ensure that actions/result stages never duplicate accumulator updates? The PR title and description are more general than this, but the associated JIRAs suggest the restricted scope.
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